Import Module error when deploying compiled typescript to lambda - node.js

Question

I'm converting some of my JS code to typescript and when deploying using serverless framework to a lambda on AWS and running it i'm getting the below error. At first I thought one of my imports was bad but it looks like everything is as expected.
{
"errorType": "Runtime.ImportModuleError",
"errorMessage": "Error: Cannot find module 'tslib'\nRequire stack:\n- /var/task/handlers/Create.js\n- >/var/runtime/UserFunction.js\n- /var/runtime/index.js",
"trace": [
"Runtime.ImportModuleError: Error: Cannot find module 'tslib'",
"Require stack:",
"- /var/task/handlers/Create.js",
"- /var/runtime/UserFunction.js",
"- /var/runtime/index.js",
" at _loadUserApp (/var/runtime/UserFunction.js:100:13)",
" at Object.module.exports.load (/var/runtime/UserFunction.js:140:17)",
" at Object. (/var/runtime/index.js:43:30)",
" at Module._compile (internal/modules/cjs/loader.js:956:30)",
" at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)",
" at Module.load (internal/modules/cjs/loader.js:812:32)",
" at Function.Module._load (internal/modules/cjs/loader.js:724:14)",
" at Function.Module.runMain (internal/modules/cjs/loader.js:1025:10)",
" at internal/main/run_main_module.js:17:11"
]
}
Serverless:
functions:
createFamily:
name: ${self:custom.createFamilyName}
handler: handlers/Create.createFamily
description: Lambda for Creating a family in the family service
timeout: 30
events:
- http:
path: /family
method: post
private: true
Handler:
import { APIGatewayEvent, Context, ProxyResult } from 'aws-lambda';
import { utilities } from '../handlers/utilities';
import { familyService } from '../services/FamilyService';
import { IFamily } from '../interfaces/IFamily';
let familyData: IFamily;
let serverReturn: IFamily;
export const createFamily = async (
event: APIGatewayEvent,
context: Context
): Promise<ProxyResult> => {
try {
if (!event.body) {
return utilities.BuildResponse(400, JSON.stringify('Object to create was not provided'));
}
familyData = JSON.parse(event.body);
serverReturn = await familyService.createFamily(familyData);
if (!serverReturn) {
return utilities.BuildResponse(404, JSON.stringify('Failed to create Family'));
}
return utilities.BuildResponse(201, JSON.stringify(serverReturn));
} catch(err) {
console.error('Family Service Create a family error: ', err);
return utilities.BuildResponse(500, JSON.stringify('Family Service internal server error'));
}
}

Answer 1

You need to compile your typescript down to javascript and reference the transpiled output in the template.